spacedriveapp/spacedrive · error · anyhow::Error

Downloaded file size mismatch: expected {}, got {}

Error message

Downloaded file size mismatch: expected {}, got {}

What it means

After downloading, the updater compares bytes.len() against the asset 'size' reported by the GitHub API and rejects mismatches. A difference means the transfer was truncated or re-encoded (transparent gzip by a proxy/CDN), or the asset was replaced after the metadata fetch so the byte count no longer lines up.

Source

Thrown at apps/cli/src/domains/update/mod.rs:160

async fn download_file(url: &str, expected_size: u64) -> Result<Vec<u8>> {
	let client = reqwest::Client::builder()
		.user_agent("spacedrive-cli")
		.build()?;

	let response = client.get(url).send().await?;

	if !response.status().is_success() {
		return Err(anyhow::anyhow!(
			"Failed to download: HTTP {}",
			response.status()
		));
	}

	let bytes = response.bytes().await?;

	if bytes.len() as u64 != expected_size {
		return Err(anyhow::anyhow!(
			"Downloaded file size mismatch: expected {}, got {}",
			expected_size,
			bytes.len()
		));
	}

	Ok(bytes.to_vec())
}

fn replace_binary(path: &PathBuf, data: &[u8]) -> Result<()> {
	use std::fs;

	// Create backup
	let backup_path = path.with_extension("bak");
	if path.exists() {
		fs::copy(path, &backup_path)?;
	}

View on GitHub (pinned to 6dfeccf211)

Solutions

1. Retry 'sd update' on a stable connection
2. Disable VPN/proxy for the download and retry
3. Compare the release page's listed asset size with the download; if the release itself is broken, update manually from a previous release

#!/usr/bin/env bash
expected=$(curl -s https://api.github.com/repos/spacedrive/spacedrive/releases/latest | jq -r '.assets[] | select(.name | contains("sd-daemon")) | .size')
actual=$(curl -sL <download_url> | wc -c)
[ "$actual" = "$expected" ] || { echo "Size mismatch ($actual != $expected)"; exit 2; }

match download_file(&url, expected_size).await {
    Ok(bytes) => bytes,
    Err(e) if e.to_string().contains("size mismatch") => {
        // transient truncation or re-encoding: one full re-download before giving up
        download_file(&url, expected_size).await?
    }
    Err(e) => return Err(e),
}

When it happens

Trigger: Connection dropped mid-body; a proxy re-compressing the binary stream; the release asset re-uploaded between metadata fetch and download.

Common situations: Flaky Wi-Fi/VPN links; corporate transparent proxies; mirrors that alter content encoding.

Related errors

• Failed to fetch releases: HTTP {}
• Failed to download: HTTP {}
• No paired devices found. Pair a device first with: sd networ
• Remote device {} is not online
• Could not find sd binary for platform: {}

AI-assisted analysis of spacedriveapp/spacedrive@6dfeccf211 (2026-08-16). Data as JSON: /api/errors/0850ee00ef2b3db1. Report an issue: GitHub.